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Sunday, June 7, 2020

BEST SCIENCE 400 MCQ FOR TNPSC EXAMS 2020


forthcoming competitive exams TNPSC CCSC IV(GROUP 4&VAO), SO, PC 2020 for these exams we have given 400 questions and answers so practice well to clear the exams. For the exams practice, e have given you the science material question bank to clear the exam. In this post, e have shared some important questions that may help you to clear the exams in a successful manner.


 To achieve this exam practice these questions every day it is possible to reach your goal. These 400 questions were more than enough to clear the exams. For the exams the questions that we are given you they are rare question and answers.so concentrate on these questions to clear the exams. these question that we have given you they are free from cost. If you practice these questions each_and _ every day you will achieve your goal. 

The candidate should follow the entire book bank question throughout. If you fell these questions and answers were useful and helpful for you to re with your friends and family circle. So that your friend may also feel somewhat east to clear the exams. 


IMPORTANT POINTS TO REMEMBER:-

Biology is a natural science concerned with the study of life and living organisms, including their structure and functions. The living world comprises of plants and animals.  Various parts of the plants are used as food, medicine, wood, and shelter. 4.1 Plant forms and functions: Our body is made up of many organs. Similarly, the plant body is also made up of several organs such as root, stem leaves and flowers.


 Plants are of many forms and many colours, yet they are alike in some manner. That is, they all have stems and leaves above the ground which we can see easily and roots below the ground.

As shown in the picture, a flowering plant consists of two main parts.
 They are,
1. Root system.
 2. Shoot system Let us learn about these in detail.

1.Root system Root

The underground part of the main axis of a plant is known as root. It lies below the surface of the soil. Root has no nodes and internodes. It has a root cap at the tip. A tuft of root hairs is found just above the root tip. Roots are positively geotropic in nature. The plant's root system is classified into two types.

 1. Taproot system
2. Fibrous root system

1. Taproot system It consists of a single root, called taproot, which grows straight down into the ground. Smaller roots, called lateral roots arise from the taproot.

 They are seen in dicotyledonous plants.

 Example: Bean, Mango, Neem. 2. Fibrous root system It consists of a cluster of roots arising from the base of the stem. They are thin and uniform in size. It is generally seen in monocotyledonous plants. Example: Grass, Paddy, Maize.


2. Shoot system Stem The aerial part of the plant body above the ground is known as the shoot system. The main axis of the shoot system is called the stem. The shoot system consists of stem, leaves, flowers and fruits. The stem grows above the soil, and it grows towards the sunlight. t has nodes and internodes. Nodes are the parts of the, where leaf arises.

The part of the stem between two successive nodes are called an anode. The bud at the tip of the stem is known as apical or terminal bud, and the buds at the axils of the leaves are called auxiliary buds.


Functions of the stem The stem,

• supports the branches, leaves, flowers and fruits. transports water and minerals from roots to upper aerial plant parts.
• transports the prepared food from leaves to other parts through stem.
 • stores food as in the case of sugarcane. Structure of a leaf The leaf is a green, flat expanded structure borne on the stem at the node. 


  BEST SCIENCE 400 MCQ FOR TNPSC EXAMS 2020- DOWNLOAD

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